$42.99

Main Bearing Set;
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Sealed Power MA Series Main Bearings 4663MA 30

Sealed Power MA Series Main Bearings 4663MA 30

SLP-4663MA30

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Part Number: SLP-4663MA30

Estimated Ship Date: Mar 19, 2026

$42.99

Estimated Ship Date: Mar 19, 2026 Would you rather pick it up?

Overview

Brand:
Manufacturer's Part Number:
4663MA 30
Part Type:
Product Line:
Summit Racing Part Number:
SLP-4663MA30
UPC:
614046364554
Bearing Usage:
Performance
Engine Crankshaft Undersize (in.):
0.030 in.
Engine Crankshaft Undersize (mm):
0.75mm
Grooved Bearing:
No
Thrust Bearing Oversize:
Stock
Bearing Material:
Bi-metal aluminum alloy, A-Series
Quantity:
Sold as a set of 5.

Sealed Power MA Series Main Bearings

These Sealed Power MA Series main bearings can actually polish the journals on your crankshaft. That's because there's a small percentage of silicon mixed in with the aluminum and tin that make up the bearing-surface alloy. The silicon is there for wear resistance, but its toughness actually smoothes the journals of a crank whose surface hasn't been optimized! This special surface alloy is laid over a high-strength 1010 steel backing and delivers improved seizure and corrosion resistance, as well as better control of wall variance. It also helps to minimize debris embedding, which can score the crank's surface.

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